Abstract
The kinetics and dynamics of post-yield fracture behavior of polyamide-6 (PA-6)/polypropylene-grafted-maleic anhydride (PP-g-MA)/clay nanocomposites are comprehensively evaluated. To ascertain the nature of crack growth from kinetic aspects, time-synchronized deformation data prior to failure are acquired as images at various time scales. This study demonstrates the nanoclay induced crack toughness mechanism evident from the dominance of crack tip opening displacement over crack extension to be originating fundamentally due to the intrinsic ability of the material to dissipate stress waves from the inner fracture process zone (IFPZ) to the outer plastic deformation zone. Such quantification of stress wave dissipation modes via strain field analysis demonstrates a new approach to understand fracture-mechanics for designing materials objectively aided by convincing visualization.
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